Expansion shield



Jan. 8, 1929. 1,698,570

l c. c. ToMKlNsoN ExPANs'IoN SHIELD Filed Dec. 6, 1924 luf@ @L 342g# @gf/0 ffy/z @w :2M @Le l i; io n @a v my v INVENTOK 5 (dfes Tow/M750@ Patented Jan. 8, 1929..v

UNITED; STATESy Pear CHARLES C, TOMKINSON, OF PLAINFIELD, NEW JERSEY,

l 1,698,570 FFCE. i,

ASSIGNOR TO J'. EDWARD OGDEN', OF MONTAINVILLE, NEW YORK.v

EXPANSION SHIELD.

Application ined December c, 1924. serial No. 754,255.

with and expanded by va driven expanding element such, for instance, as a nail.

Further objects of the invention will ap, pear from the following specification taken in connection with the drawings, which form a part of this application, and in which f Fig. 1 is an elevational view of one form of Vexpansion shield lconstructed. in accordance with the invention. Y e

Fig. 2 is an elevational view taken at right angles to Fig. 1. v

Fig. 3 is anvelevational view of the shield shown in Fig. l, this view being taken'lSOo from the view shown in Fig. 1.

Fig. 4 is a. bottom plan view of the construction shown in Fig. 2. o

Fig. 5 is a top plan view ofthe structure shown in Fig. 2.

Fig. 6 is a transverse lsectional elevation taken substantially on line 6-6 of Fig. 2.

Fig. 7 is an elevational view of another form of shield constructed in accordance with the invention.

Fig. 8 is an elevational view taken at right angles to Fig. 7. Y

Fig. 9 is an elevational view similar to Fig. 7, but showing the opposite side elevation of the shield.

Fig. 10 is a bottom plan view of the shield shown in Fig. 8.

Fig. 11 is a top plan view of the construction shown in Fig. 8. Y y Fig. 12 is a transverse sectional elevation I taken substantially on line 12-12 of Fig. 8.

Fig. 13 is an elevational view of another form of shield constructed in accordance with a the invention.

. Fig. 14 is an elevational view taken at right angles to Fig. 13.

Fig. 15 is an elevational view similar to Fig. 13 but showingvthel opposite side of the shield in elevation.

` shown in Figs. 7-12, expanded.

. Y F ig. 16 isa bottoni plan view ofthestruce E ture shown in Fig. 14.

Fig. 17 is a top shown inF ig. 15.

' Fig. 18 is a transverse sectional elevation taken substantially on line 18-18 of Fig. 14.

kplan view ofthe structure f,

Fig. 19 is an elevational View of another 1' shield constructed in accordance with the invention. t f

Fig. 20 is an elevational view taken at right anglesrto Fig. 19. I

Y Fig. 21 is an elevational view showing the ,Y

opposite side of the shieldshown in`Fig.,19.

Fig: 22 is a bottom plan view of the construction shown in F ig. 20.

Fig. V23 is a top plan View of the structure shown in Fig. 20.

Fig. 24 is a transverse Sectional elevationl taken substantially on line 24-24-,of Fig. y 20, and a e Y f j Fig. 25 is an elevation showing the shield The inventionbriefly describedconsists of a shield having a. plurality of longitudinallyV extending expansible portions and having laterally extending flanges at one end thereof. In the particular embodiments of the invention illustrated, the shield isV formed of a single piece of wire bentto provide the longitudinally extending expansible'portions and the laterally extending flanges. In certain ally expansible portions and in other forms, there are two expansible portions, but it will be understood that the Wire may be bent to form any desired number of, expansible portions. Thesliield is so constructed` andarranged that when an expanding element is;`

i driven thereinto, the expansible portions will be forced ,laterally into `gripping engageforms of the invention, there are three laterment with the walls of the opening in which theshield is placed. F urther details oftheI invention will appear from the following de-p scription. Y l,

Inthe forni of the'invention illustrated in Figs. 1 to G inclusive, the shield comprises a pair .of longitudinally extending expanj sible Sections 30 and 31. VThese,sections are formed from a single piece of wire having its ends 32 and 33 disposed at theinner end, of-

thefshield and forming the base of the shield.

The wire intermediate its ends is bent later# i ally to form the flanges 34 and 35 and the' section 30 has its inner end formed as aloop y 36. When an expanding element is driven no I y into the shield shown in Figs. l to 6, the lonlongitudinally extending sections 40, 41 and *42, each of these sections comprising two f Within loops 46 and 47, which forni the end y 1 With the Wall opening.

-are'shcwn at 48 and VThe two ends of the Wire 44, these ends being bent laterally as illustrated and being disposed lengths of. Wire.

flanges of the shield. rlhe sections 40, 41 and V42 are formed lby substantially parallel lengths ofWire, the Wire at the inner ends "tion of the shield.

of the sections being bent back upon itselfas shown at 48 to form loops.

Brieflystated, the Wire is bent as follows. One end of the Wire is bent laterallyasgfor instance, at 43 and the Wire is then bent back upon itself to form a loop 48 andthe wire bent back on itself is substantially parallel to the first section and looped to form the second section 42 of the shield. Then the tio'ii4'1,vthe end ofthe Wire Vbeing bentV laterally vas shown at 44.

When an expanding element is driven into the'shield shown in Figs. 7 to 12 inclusive,

Vthe three sections are forced radially and laterally into gripping engagement With the Wall opening., p Y The shield of Figs. 7-12 is shown in- Fig. 25 as expanded'.V VIt will be noted that the engagement of the expanding element or nail 'With the loops 48 has forced theloopvends outwardly, thus increasing the gripping ac- The Vshield show-n in Figs. 13 to 18 inclusive also comprises three sections 50, 51 and 52. In this .form'of the shield, the tWo ends ofV i the Wire are bent laterally and substantially parallel to veach 'other as shovvn at 53 to yformL one ofthe flanges. The Wire'is then .bent to form three elongated longitudinally extending loops or sections 50,151 and 52 and flanges 54 and 55 are formed by'bending laterally the loops at the outer ends of the sections.

Vlll'hen an expanding element is driven into the'shield shown inFigs. 18 to'18, thethree sections are forced'radially andlaterallyinto gripping engagement vvith the Wallopening.

The-Shield shown inFigs. 19 to 24'inclusiveisfo'rmed of flat Wire instead of round Wire as inthe preceding forms.V In this embodiment, the tWo ends`60 and 61 are bent laterally to form flanges VandV a flange 62 is formed 'by a laterally extending loop inter-v Theshi'eld in this instance comprises a pair of expansible mediate the ends of the Wire.

sections 63 and 64. Each section comprises a longitudinally extendingelongated loop,

jpansible loop portions, extending throughout the length ofthe shield, Y vsaid portions having angularly disposed lati erally extending flanges fat one end thereof.

one length 65. ofthe loop 63 being connected po one length 66 of the loop "64 bythe flanged Y oop formed by the vportion of Wire having thev ,laterally extending vflange 60 or 61 at the end 62. The other length of each loop is into'theshield, the tvvo vsections Will be forced laterally thereby 'intogripping engagement i andthe labor necessary'wi'll be `reduced toav i Y -v Y B5 minimum.

Although certain specific embodiments -of vthe V'invention have been. particularlyshown and described, it will be-understood that the invention is capable Vof further modification and that further changes in the construction desenpaon, a Wiiibeand in the arrangement of the various cooperating parts maybe made Without departing from the spirit or vscope of the invention, -as expressed inthe following claims;

What l claim isi f i 1.,' A single piece. expansion Vshield having a plurality offlongitudiiially extending :ex-

2. A single piece expansion shield' formed ing angularly disposed laterally extending flanges at Vone end thereof.

8. An expansion shield having a Yplurality of expansible sections, each section comprisfing an elongated longitudinally extending' :loop closed at its inner end.

4. `An expansion shield having ay plurality l fos each of -sa-id portions Vof Wire and having a plurality of longitudi- .'nally extending expansibleloops and hav-v of expansible sections arranged around acen- I Atral opening, each section comprising an elori-` gated'longitudinal loop and having la'iflange Y at its, outer' end.

5; An expansion shield having plurality of expansible sectionsarranged around acentral'opening,each section comprising an eflon- K gated longitudinal loop, said shieldzhaving radially lextending vflanges fat the outer end thereof. f

6.' An expansion having a plurality of 7expai'isible.sections, each section comprising an elongated longitudinal loop closedv at `itsinner fend.

shield formed: of Wlifre `and v 7. An expansion shield formed of -vvire v vandrh'avinga plurality lof-'expansible sections,`

each section comprising an elongated loop, l

all!

said shield having loops at the outer end thereof bent laterally to form angularly disposed flanges.

8. An expansion shield formed of wire and comprising a plurality of longitudinally extending Wire loops closed at its inner ends.

9. An expansion shield formed of wire and comprising a plurality of longitudinally extending wire loops extending throughout the length of the shield, said shield having a plurality of laterally extending loops at the outer end thereof forming flanges. Y

10. An expansion shield formed of a single piece of wire and comprising a plurality of longitudinally extending wire loops.

11. An expansion shield formed of a single piece of wire and having a plurality of expansible sections, each section comprising an elongated longitudinally extending loop, said shield Vhaving laterally extending flanges at the outer end thereof.

12.v In combination, an expansion shield formed of wire and having` a plurality of expansible sections, each section comprising an elongated loop closed at its inner end, and

an expanding element of greater length than the length of the shield whereby the element will engage and force laterally the inner ends of the loops.

13. In combination, an expansion shield formed of wire and havingfa plurality of expansible sections, each section comprising an elongated loop, said shield having laterally extending flanges at the outer end thereof, and a flanged expanding elementof greater length thanthe length of the shield whereby the element will engage and force laterally the inner ends ofthe loops.

lll. In combination, an expansion shield formed of Wire and having a plurality of expansible sections, each section comprising an elongated loop closed at its inner end, and a drive expanding element of greater length than the length of the shield whereby the i element will engage and force laterally the inner ends of the loops.

15. An expansion shield formed of wire and comprising a plurality of laterally ex pansible portions, each portion consisting of a loop closed at its inner end, and a plurality of radially disposed flanges at the outer ends of said shield.

16. A new article of manufacture comprising a wire expansion shield formed of wire bent back on itself to form a longitudinally extending bore, said bore being surrounded by a'maximum of four parallel and longitudinally extending strands of Wire and*` having a wire head at an angle to the par-v allel strands of wire.

17. A new article of manufacture comprising a Wire expansion shield formed of wire bent back on itself to form four parallel longitudinally extending strands of wire and an integral Wire head formed in tWo parts.

18. In an expansion shield the combination of a wire shield formed by bending strands of wire back on themselves so that when expanded the shield will have a primary radial expansion in one direction, and a secondary radial expansion in a dierent direction, and

l an expanding member adapted to first 'cause the primary radial expansion in one direction .on partial insertion ofV the expanding member, and cause the secondary radial expansion the complete insertion of the expanding member. i -f 19. In an expansion shield the combination of a wire shield formed by bending strands of wire back on themselves to form parallel and longitudinally extending strands so that when expanded the shield will have a primary radial expansion in one l direction, and a,

secondary radial expansion in a different direction, and an expanding member adapted to first cause the primary expansion in one direction on partial insertion of the expanding member, and cause the secondary expansion of the wire shield in a different direction onV radial expansion in a different direction, and

an ordinary nail adapted Vto first cause the primary expansion of the wire shield in one direction on partial insertion of the nail, and to cause the secondary expansion of the wire shield in a different direction on the complete insertion of the nail.

21. An expansion shield comprising a plurality of longitudinally extending expansible loops, each loop extending throughout the length of the shield and having its outer end bent laterally to form a flange, the flanges formed on the loops being angularly disposed relative to each other.

In witness whereof, I have hereunto set myq hand this 29th day of November, 1924.

CHARLES C. TOMKIN SON.

75 of the wire shield in a different direction on Y 

